Sheet metal



' UNITED sTATEs PATENT oEErcE.

SAMUEL HALL, OF NEW YORK, N. Y.

CUTTING SHEET METAL.

Specification of Letters Patent No. 16,481, dated January 27, 185'?.

To all whom it may concern.-

Be it known that I, SAMUEL HALL, of the city, county, and State of NewYork, have invented a new and useful Shearing-Machine for Cutting LargeSheets of Metal, &c.; and I do hereby declare that the same is describedand represented in the following specifications and drawings.

To enable others skilled in the art to make and use my invention I willproceed to describe its construction, use, and operation, referring tothe drawings in which the same letters indicate like parts in each ofthe figures.

Figure l, is a perspective view of the machine showing the front end andright side. Fig. 2, is a perspective view showing a position of thefront end and left side. Fig. 3, is a cross section above the score Z),b.

The nature of my invention and improvements in shears, consists inmaking the scores in the stock which the edges of the sheet metal cutpass into, within or below the line or plane of the face of each shearblade or cutter, and increasing them in depth as they extend from thecutters so as to afford room to vibrate the sheet of metal being cutedgewise, when the shears are open, or while they are cutting, andincreasing the thickness of the stock opposite the scores, to give itstrength when the scores are increased in depth.

In the accompanying drawings A, is the base of the stock or frame and B,the upright position which I prefer to cast altogether of iron or othermeta-l, with two projections C, and D at the top for the journals of theshaft E, as shown in the drawing. This shaft is secured by the caps F,F, and provided with a loose and fast pulley for the band which is tooperate the machine. The front end of the stock B, is provided with abox Gr, for the upper end of the traverse rod H, to work in; the lowerend of said rod traverses between the cheeks I, I, of the stock asrepresented. This traversing rod I-I, is made in the form shown, with anoblong hole J, in it for the eccentric box K, to traverse in whichoperates it. The eccentric L, is made on the shaft M, which shaftextends through the stock B, in the enlargement N, made for that purposeand is fitted to turn in it, so as to carry the eccentric and traversethe rod I-I, which rod carries the shear blades O, and P, which arefastened to its lower end as shown in the drawing. The gear Q, is fittedto turn freely on the shaft M and is acted upon by the pinion R,fastened upon the shaft E, for that purpose; and a fly wheel may beapplied to this shaft beyond the pinion R,

from turning on the shaft, which clutch is l fitted to traverse on saidshaft between the stock and the gear Q, and is traversed, so as to lockthe gear to, or release it from the shaft by the lever U, vwhichvibrates in the stand V, on the stock; one end of the lever U, beingfitted to a score in the periphery of the clutch for that purpose. Thefront plate lV, is fitted between the cheeks I, I, and fastened withscrews so as to hold the traverse rod in its proper place; this platelV, extends up and is provided with a score for the ournal X, of theeccentric shaft M,

outside or beyond the eccentric; and they cap Y, is fastened to theplate YV, over the Journal X, and a bar Z, extends up from the cap withits upper end fastened to the box G, as shown in the drawing to supportthe journal X, outside or beyond the eccentric. The lower end of thetraverse rod H, may be made in the form represented so as to carry twoshear blades O, and P, arranged at right angles to each other andfastened to the lower end of the rod as shown in the drawing; whichblades O, and P, act in connection with the blades O, and P, fastened tothe block B', which may be made in the form shown in the drawing or ofsuch other form as will answer the purpose, and fastened to the base A,as shown in the drawing or otherwise. The base A, has some lugs upon itwhich are perforated by the screws a, a, to aid in adjusting and holdingthe block B.

The blades O, and O, may be used to trim the edges of sheets of metaland for some other purposes without removing either of the blades P, orP; but if a large sheet of metal is to be divided by the blades P, andP', the blade O, must be removed so as to allow such sheet to beintroduced between P, and P, so as to be cut by them, and every time P,is raised by the eccentric L, the sheet may be pushed is as the edgescut pass into the scores b, b, and 0, c; and as the score Z2, b, is cutwithin or below the line or plane of the face of the blade P, and thescore c, c,

is cut below or within the line or plane of the face of the blade P, soas to allow the sheet oit' metal cut to be vibrated edgewise whennecessary, as it is pushed in between the cutters, and in order lthatthere may be ample room to vibra-te the sheet, as it is pushed inbetween the blades, I cut or make the scores b, b, and 0, 0, deepest atthe rear edge of the stock as shown in Fig. 3, by the dotted lines, b,representing the bottom of the score b, b, and c', the bot-tom of thescore c, c.

In order to secure the requisite strength in the stock B, opposite thescores, I make a swell or swell and ribs CZ, on the stock opposite thescore I), Z1, and another opposite the score c, c, as shown at c, Fig.2.

Theneve-r it is desirable to use this ma chine for punching instead ofshearing the blades O, and P, may be removed, also the block B', and adie block put in its place; and the shanks of the punches inserted inthe lower end of the traverse rod H, which should be ,perforated forthat purpose, when punching may be performed with as much, if not withgreater facility, than it is on ordinary punching machine.

I believe I have described and represented the construction, operationand use of my improvements in shears so as to enable any person skilledin the art to make and use them; I will now specify what I desire tosecure by Letters Patent to wit:

I claim making the scores c, c, and b, Z), in the stock of the shearsfor the edges of the sheet metal cut to pass into, within or below theline or plane of the Jface of each shear blade or cutter, and increasingthem (the scores) in depths, as they eXtend from the cutters,substantially as described for the purposes set forth.

SAMUEL HALL.

Vitnesses: Y

J. DENNIS, JOHN S. HoLLINGsHEAD.

